Answer:
Her electric toothbrush makes 210,000 rotations in one week
Step-by-step explanation:
Note that:
1 minute = 60 seconds1 week= 7 days∵ Gerry brushes her teeth for two minutes, twice a day
→ Twice means times 2
∴ Gerry brushes her teeth for 2 × 2 = 4 minutes a day
∵ Gerry's electric toothbrush rotates the brush 125 times per second
∵ 1 minute = 60 seconds
→ Multiply 125 by 60 to find the number of rotating in 1 minute
∴ Gerry's electric toothbrush rotates 125 × 60 = 7,500 in 1 minute
∵ Gerry brushes her teeth for 4 minutes a day
→ Multiply it by 4 to find the number of rotation in 1 day
∴ Gerry's electric toothbrush rotates 7,500 × 4 = 30,000 in 1 day
∵ 1 week = 7 days
→ Multiply the number of rotation in 1 day by 7 to find it in 1 week
∴ Gerry's electric toothbrush rotates 30,000 × 7 = 210,000 in 1 week
∴ Her electric toothbrush makes 210,000 rotations in one week
Pls help I’ll give you brainly
4x^2 + 4x - 3 quadratic trinomial ans pls
Answer:
(2x-1)(2x+3)
Step-by-step explanation:
4x^2 + 4x - 3
4x^2 + 6x - 2x - 3
2x(2x + 3) - 1(2x + 3)
(2x - 1) (2x + 3)
Solve for
8 - 6r + 3 = 5
Answer:
r = 1
Step-by-step explanation:
8 - 6r + 3 = 5
Combine like terms
11 - 6r = 5
Subtract 5 from both sides
6 - 6r = 0
Add 6r to both sides
6 = 6r
Divide both sides by 6
1 = r
kim makes $12 per hour . write an equation showing the relationship between her total pay (p) and the number of hours she works (h)
Answer:
C) P = 12H
Step-by-step explanation:
This is because she makes 12 dollars every hour so it'll be 12 times the number of hours.
Tim has a bag of 36 orange-flavoured sweets and Peter has a bag of 44 grape-flavoured sweets. They have to divide up the sweets into small trays with equal number of sweets; each tray containing either orange-flavoured or grape-flavoured sweets only. If there is no remainder, find the largest possible number of sweets in each tray.
Answer:
the largest possible number for each would be dividing it by two so 36 divided by two is 18 and 44 divided by two is 22
so for the orange the largest number would be 18
and for the grape the largest number would be 22
HELP ASAP I DONT HAVE TIME AND IT ALSO DETECTS IF ITS RIGHT OR WRONG
Answer:
0.915 meters
Step-by-step explanation:
0.305 x 3 = 0.915
Answer:
0.915
Step-by-step explanation:
help its easy im just to lazy :)
Lin measured the diameter of a circle in two different directions. Measuring vertically, she got 3.5 cm, and measuring horizontally, she got 3.6 cm.
Which of the following are possible reasons why these measurements differ?
Select all that apply.
A. These measurements could be rounded, not exact
B. The diameter of a circle can vary when measured from different points
C. The thickness of the circle could have affected the measurements
D. Lin did not measure across the widest part when measuring vertically
E. The shape is not quite a circle, because a perfect circle is very hard to draw
What do I choose?
Answer:
I think It is C if Not pick A
Step-by-step explanation:
Someone help please thx in advance
Which of these triangles appears not to be congruent to any others shown here? Check all that apply.
Answer: b & e
Step-by-step explanation:
a and c appear congruent as do d and f
Use the distance formula to find the distance between cach pair of points. If necessary,
round to the nearest tenth.
C (-2,6), D (10,-8)
Answer:
[tex]d \approx 18.4[/tex]
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightAlgebra II
Distance Formula: [tex]d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]Step-by-step explanation:
Step 1: Define
Point C (-2, 6)
Point D (10, -8)
Step 2: Find distance d
Substitute: [tex]d = \sqrt{(10+2)^2+(-8-6)^2}[/tex]Add/Subtract: [tex]d = \sqrt{(12)^2+(-14)^2}[/tex]Exponents: [tex]d = \sqrt{144+196}[/tex]Add: [tex]d = \sqrt{340}[/tex]Simplify: [tex]d =2 \sqrt{85}[/tex]Evaluate: [tex]d = 18.4391[/tex]Round: [tex]d \approx 18.4[/tex]Divide the following polynomial expression.
(n^4 +5n^3+9n^2) / 9n^3
Type the correct awnser in the box
The value of x is _____ and the value of y is____.
Answer:
X= 60 Y= 50
Step-by-step explanation:
180-50-60= 70 (not marked angle)
180-50-70= 60 (angle x)
180-70-60= 50 (angle y)
Answer:
x=60
y=50
Step-by-step explanation:
I think this is right.
which statement describes the graph of the function f(x)=x^2-1/x^2-2x+1
A. there is a hole at x=-1
B. there is a vertical asymptote at x=-1
C. the y-intercept is y=-1
D. there is a horizontal asymptote at y=-1
Answer:
The Y-intercept is -1
Step-by-step explanation:
M*thway is a pathway to many abilities some considered to be... unnatural
Statement (C) the y-intercept is y=-1 describes the graph of the function.
What is a function?It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.
We have a function:
[tex]\rm f(x) = \dfrac{x^2-1}{x^2-2x+1}[/tex]
The above function is a rational function.
The denominator cannot be zero
x² - 2x + 1 ≠ 0
(x - 1)²≠ 1
x ≠ 1
To find y-intercept plug x = 0
f(0) = -1
Thus, statement (C) the y-intercept is y=-1 describes the graph of the function.
Learn more about the function here:
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I need help plsssss ...... name the transversal that connects them and classify the angle pair
Answers:
The transversal line is line s
The angles 6 and 16 are same side exterior angles
=================================================
Explanation:
Erase everything but lines p, q, and s. Also, we'll keep angles 6 and 16 as well. Check out the diagram below.
As you can see from the diagram, lines p and q act like the parallel lines. Imagine we can shift line p to make it horizontal so it's parallel to line q. This might help show that angles 6 and 16 are same side exterior angles.
Note: Because line p is not parallel to line q, this means angles 6 and 16 are not supplementary (they don't add to 180).
What's the exact amount of numbers that have been discovered in PI π?
First correct answer will be marked brainliest
Answer:
It has an infinite amount as the decimal keeps going to over 1 million digits and beyond.
Step-by-step explanation:
The sum of the measures of ∠QRT and ∠TRS is 180∘.
What is the measure of ∠TRS?
Enter the correct answer in the box.
Answer:
90° i think..........
Pls help pls
10 POINTS pls
Answer:the answerrr is 55tktktng
Step-by-step explanation:
Answer:
f(x)=-2x-5
f= -2 (-6) -5
f= 12-5
f= 7 so the answer is A
the answer is C, y= -200x +6000
Consider the polynomial function q(x) = -4x5+2x4
3x2 + 12x.
What is the end behavior of the graph of q?
Answer:
B
Step-by-step explanation:
If it’s for khan positive , negative, negative, positive
-3x + 7 (-6 – 5c)
C= 7
x = -9
Answer:
=−260
Step-by-step explanation:
A function, fox), models the depth of water in a wading pool that is filling at a rate of 11 gallons per minute. Which of these describes why fx) can be considered a linear function? I. For every 1 minute interval, the depth of water in the wading pool increases by the same amount. II. The function grows by equal factors every minute. III. The slope of the function is constant. I only I and III only
1
Step-by-step explanation:
35°
50°
?
Find the measure of the missing angle:
Answer:
i think the answer would be 95 degree. im not absolutley positive though
Step-by-step explanation:
i added 35 and 50 and got the sum of 85 then i subtracted 85 from 180 and got 95
feedback is appreciated.
(i'm not gonna beg for brainliest)
Drag the tiles to the correct boxes to complete the pairs.
Match each graph with a description of its correlation.
Tiles:
modest negative correlation
weak negative correlation
perfect negative correlation
modest positive correlation
strong positive correlation.
Answer:
Graph 1: perfect negative correlation
Graph 2: modest negative correlation
Graph 3: modest positive correlation
Graph 4: strong positive correlation
Graph 5. weak negative correlation
Step-by-step explanation:
If i'm wrong PLEASE correct me
The graph first is perfect negative correlation, graph second is the modest negative correlation.
What is correlation?It is defined as the relation between two variables which is a quantitative type and gives an idea about the direction of these two variables.
[tex]\rm r = \dfrac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{{[n\sum x^2- (\sum x)^2]}}\sqrt{[n\sum y^2- (\sum y)^2]}}[/tex]
As we know, the coefficient of correlation varies between -1 and +1.
If r = +1 (means the relation between the variable is strong and positive)
If r = -1 (means the relation between the variable is strong but negative)
As we can see in the graph, the line goes down represents the negative correlation and the line goes up represents the positive correlation.
So, we can say:
The first graph is perfect negative correlation.
The second graph is modest negative correlation.
The third graph is modest positive correlation.
The fourth graph is strong positive correlation.
The fifth graph is weak negative correlation.
Thus, the graph first is perfect negative correlation, graph second is the modest negative correlation.
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Jodie is on the swim team. Below are four of her times swimming 100 meters.
22.98 seconds, 23.09 seconds, 23.06 seconds, 22.83 seconds
What is the difference between her best time and her worst time?
A.
0.03 second
B.
0.23 second
C.
0.11 second
D.
0.26 second
The difference between her best time and her worst time is equal to 0.26 seconds.
What is algebra ?
Algebra is a branch of mathematics that deals with various symbols and the arithmetic operations such as division , multiplication , etc.
Jodie has to swim for 100 meters. The four of her times to cover this distance are 22.98 seconds, 23.09 seconds, 23.06 seconds, 22.83 seconds.
Let's find the time per sec to swim at each instances.
So ,
100 meters in 22.98 seconds meant :
= 100 / 22.98
= 4.35 m/sec
Similarly ,
100 meters in 23.09 seconds meant :
= 4.33 m/sec
100 meters in 23.06 seconds meant :
= 4.34 m/sec
100 meters in 22.83 seconds meant :
= 100 / 22.83
= 4.38 m/sec
So , we can find out that Jodie swims distance of 100 meters fastest on speed of 4.38 m/sec in 22.83 seconds and slowest on speed of 4.33 m/sec in 23.09 seconds.
The difference between her best time and her worst time is :
= 23.09 - 22.83
= 0.26 seconds
Therefore , the difference between her best time and her worst time is equal to 0.26 seconds.
Learn more about algebra here :
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Sars Sandwich Shop sells wraps and sandwiches as part of its lunch specials. The profit on every sandwich is $2 and the profit on every wrap is $3. Sal made a profit of $1,470 from lunch
specials last month. The equation 2x + 3y = 1470 represents Sat's profits last month, where x is the number of sandwich lunch specials sold and y is the number of wrap lunch specials sold
1. Change the equation to slope-intercept form. Identify the slope and y-intercept of the equation. Be sure to show all your work
2. Describe how you would graph this line using the slope intercept method. Be sure to write using complete sentences
3. Write the equation in function notation. Explain what the graph of the function represents Be sure to use complete sentences,
4. Graph the function on the graph, make sure to label the intercepts. You may graph your equation by hand on a piece of paper and scan your work or you may use graphing
technology
5. Suppose Sal's total profiton lunch specials for the next month is $1.583. The profit amounts are the same: $2 for each sandwich and $3 for each wrap. In a paragraph of at least three
complete sentences, explain how the graphs of the functions for the two months are similar and how they are different
6. Below is a graph that represents the total profits for a third month. Write the equation of the line that represents this graph Show your work or explain how you determined the
equations
Answer:
I didn't find any results but if I find one I let you know
Step-by-step explanation:
I hope that help's??
Which situation is an example of an observational study?
O A. Finding the number of red jellybeans placed in an average jar of
O B. Having customers fill out a questionnaire about their favorite
O c. Dividing a class into thirds, giving each third a different amount of
O D. Placing different groups of people in different colored rooms and
jellybeans by counting
brand of toothpaste
time to read, and then testing comprehension
recording their mood
Answer:
it finding the number of jelly beans
Step-by-step explanation:
Having customers fill out a questionnaire about their favorite brand of toothpaste is an example of an observational study.
Option B is the correct answer.
What is an observational study?An observational study is a research method in which the researcher observes and records behavior or data without directly manipulating the variables.
We have,
In an observational study, the researcher simply observes and records data as it naturally occurs, without interfering or influencing the study participants.
This type of study is often used in social science research, as well as in medical research and epidemiology, to study the relationships between variables and to identify patterns or trends in the data.
Observational studies can be either cross-sectional, where data is collected at a single point in time, or longitudinal, where data is collected over an extended period of time.
In this case,
The researchers are simply observing and collecting data without actively manipulating any variables or performing any interventions.
Thus,
Having customers fill out a questionnaire about their favorite brand of toothpaste is an example of an observational study.
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Jada earns $7 per hour mowing her neighbors’ lawns. Andre gets paid $9 plus 4 per hour.
What system of equations represents this situation?
Answer:
Jada's amount: 7h = m
Andre's amount: 4h + 9 = m
h = hours
m = money (total cost)
The system of equations that represents the situation is yx = y.
Step-by-step explanation:
The system is yx = y, since the amount of dollars per hour multiplied by the amount of hours, plus any amount (if needed) will equal the total amount of money that Jada and/or Andre receives.
Hope this helps! :D
the plan for a solid shape -maths
please help
Need help due in a few minutes. Plzzzzzz
Answer:
7 seconds
Step-by-step explanation:
set the equation to 0 because the water is the 0 point, and solve, you will get 7 and -5. It is not possible to have negative seconds so 7
what is 4/5 times 4?
Answer:
3.2
Step-by-step explanation: